@charset "UTF-8";
.list-box{
	position: absolute;
	margin-top: 100px;
	width: 400px;
	left: 50%;
	height: auto;
	border-radius: 5px;
	padding: 15px;
	text-align: center;
	-webkit-transform: translateX(-50%);
	   -moz-transform: translateX(-50%);
	    -ms-transform: translateX(-50%);
	     -o-transform: translateX(-50%);
	        transform: translateX(-50%);
}
.top-caret, .bottom-caret{
	width: 0;
	height: 0;
	border-style: solid;
	border-width: 6px;
	position: absolute;
	z-index: 1;
	left: 30px;
}
.top-caret{
	border-color: transparent transparent #555 transparent;
	top: -12px;
}
.bottom-caret{
	border-color: #555 transparent transparent transparent;
	top: 30px;
}
.bar {
	position: relative;
	height: 30px;
	background: #555;
	line-height: 30px;
	border-radius: 6px;
	box-shadow: 0 0 10px #777;
}
.bar a{
	color: #fff;
	display: block;
}
.list-box ul{
  position: relative;
  overflow: hidden;
  left: 35px;
  height: 0;
  opacity: 0;
  border-left: 2px solid #aaa;
  padding: 2px 0 12px;
}
.demo-list {
  position: relative;
  width: 80%;
  margin-top: 10px;
  height: 35px;
  line-height: 35px;
  box-shadow: 0 0 4px #777;
}
.demo-list:hover {
  background-color: #555;
}
.demo-list a{
	color: #000;
	display: block;
}
.demo-list:hover a{
  color: #fff;
}
#listBg{
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}